PSI - Issue 44

Elisabetta Maria Ruggeri et al. / Procedia Structural Integrity 44 (2023) 464–471 E. Ruggeri, G. D’Arenzo, D. Li Cavoli, R. Cottonaro, M. Fossetti/Structural Integrity Procedia 00 (2022) 000–000

470

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Table 2. Parameters from the backbone curves

SW

SW+PW

(+) displ.

(-) displ.

(+) displ.

(-) displ.

K el [kN/mm]

0.62

0.49

0.73

0.69

F y [kN]

24.06 26.20 22.00 37.05 55.38 78.00

-26.65 -29.63 -23.71 -50.35 -82.00 -94.50

46.63 49.54 39.64 63.98 85.25

-26.94 -32.01 -29.00 -26.94 -93.00 -102.00

F max [kN] F ult [kN] V y [mm] V max [mm] V ult [mm]

111.00

D [-]

2.11

1.88

1.73

2.51

The dissipated energy is presented for both SW and SW+PW configurations in Figure 9 (c). In both configurations the dissipated energy follows a similar trend. The maximum value of dissipated energy in case of SW and SW+PW configuration were equal to 10 and 25 kNm, respectively.

Fig. 9. E quivalent viscous damping υ eq and the impairment of strength ΔF 1−3 for a) SW and b) SW+PW, c) Dissipated energy.

5. Conclusions This paper presented an experimental testing program aimed at investigating the lateral response of CLT shear walls connected to perpendicular walls by means of typical screwed wall-to-wall connections. This experimental campaign was conducted at L.E.D.A. Research Centre of University of Enna “Kore”. Two different configurations were investigated in this study: single Shear Wall (SW) and Shear Wall connected to Perpendicular Wall (SW+PW). In total four experimental tests were conducted, two monotonic and two cyclic tests for the two configurations. The results of this study show that SW+PW configuration reached significative higher structural performance in terms of lateral capacity and deformation capacity than typical SW configuration. This increase of performance is governed by the properties of the wall-to-wall connections as well as the properties of the hold downs used in the perpendicular walls and shear walls. In this experimental study, in which the same hold downs were used for anchoring the shear wall and the perpendicular wall, increase of the lateral capacity and the deformation capacity up to 52% and 74% were found. A further confirmation that the perpendicular wall influences the lateral behavior of the shear wall subjected to lateral load was obtained by the asymmetry of the hysteresis loops in case of SW+PW configuration. The results presented in this study are part of a larger experimental campaign still ongoing at L.E.D.A. Research Centre of the University of Enna “Kore”, for which further results will be shown in the future considering different geometries of the shear walls.